App timer stops working - need a power cycle to fix issue

[EduanShuda]

I am using nRF52832 with nRF52 SDK 17

My application consists of two timers running every 5 seconds and every 35 ms. After some very long time and only with a few units the timer interrupts do not fire at all. I have a watchdog timer running as well and this does not even get triggered to reset the device. If I reset the device the problem persists Only fix is to completely remove the battery and put it back in. This fixes the issue every time. There are no errors in any of the 'lfclk_request(), app_tmer_init() or app_timer_create()" methods. What could this possibly be? And why can it only be fixed via a hard power cycle?

[Vidar Berg]

EduanShuda, I found this thread via this one: https://devzone.nordicsemi.com/f/nordic-q-a/79488/power_clock_irqhandler-gets-called-after-100seconds-under-unknown-circumstances-causes-the-product-to-freeze. Any chance you may be encountering the clock driver bug I mentioned?